docs: Add tip for excluding pages with Uno.Sdk (backport #18963)

[mergify]

GitHub Issue (If applicable): #18866 (reply in thread)

PR Type

What kind of change does this PR introduce?

• Documentation content changes

PR Checklist

Please check if your PR fulfills the following requirements:

• Docs have been added/updated which fit documentation template (for bug fixes / features)
• Unit Tests and/or UI Tests for the changes have been added (for bug fixes / features) (if applicable)
• Validated PR Screenshots Compare Test Run results.
• Contains NO breaking changes
• Associated with an issue (GitHub or internal) and uses the automatic close keywords.
• Commits must be following the Conventional Commits specification.

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This is an automatic backport of pull request #18963 done by [Mergify](https://mergify.com).